The abbreviation stands for "Columbia Resin #39," because it was the 39th formula of a thermosetting plastic developed by the Columbia Resins project in 1940.
CR39 stands for Columbia Resin 39, which is a lightweight, impact-resistant plastic material commonly used in the production of eyeglass lenses.
The full form of KRI is Key Risk Indicator. It is a metric used in risk management to signal changes in risk levels within an organization.
The full form of ICR is Intelligent Character Recognition. ICR is a technology used to convert handwritten or printed text into digital form for easy storage and processing. It is commonly used in document management systems, data entry applications, and other areas where handwritten or printed text needs to be digitized.
The full form of SIT can vary depending on the context. It could stand for Special Investigation Team in law enforcement or System Integration Testing in software development.
The full form of CRB can depend on the context. In the UK, it typically refers to the Criminal Records Bureau, which was a government agency responsible for conducting background checks. However, in some contexts, CRB can stand for Credit Reference Bureau, which is an agency that collects and maintains credit information for individuals and businesses.
CRFS stands for "Cortical Response Frequency Shift", which is a phenomenon observed in neuroscience relating to changes in the frequency response of cortical neurons in the brain.
CR39 is the abbreviated name of the lens material. CR39 is a plastic optical lens material with a refractive index of 1.498 (usually rounded to 1.5). It is the most commonly used plastic lens material. CR39 has replaced glass lenses as it is much lighter in weight and is safer than glass as it won't shatter or smash if dropped. Like all plastic lenses, CR39 is softer than glass and will scratch easier but it is difficult to smash.
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